Minecraft – How to test if a player has an air block underneath their feet? (1.14)

minecraft-commandsminecraft-java-edition

I'm attempting to make a "midas touch"-eqsue system where the block underneath the player's feet will turn to a gold block. However, I found that'll be troublesome if I don't detect for air blocks, since that will basically allow for the player to jump and walk in mid-air.

My command is currently this;
execute as @a at @s unless block ~ ~-1 ~ air run fill ~ ~-1 ~ ~ ~-1 ~ gold_block

Oddly, it's not looking for any (or simply isn't finding) any air blocks at all. It will detect other blocks and refuse to run there, eg. I replaced "air" with "diamond_block" and it worked in not turning diamond blocks, but it refuses to work with air.

Is this a known bug, or am I missing something?

Best Answer

You probably have this problem, because you test the command in a cave. Minecraft has air and cave air, they are considered to be two different blocks.

To solve this problem you can use this command:

/execute at @a unless block ~ ~-1 ~ minecraft:air unless block ~ ~-1 ~ minecraft:cave_air run setblock ~ ~-1 ~ minecraft:gold_block

Related Solutions

Minecraft – Test if player has specific item in specific hotbar slot [1.8]

When accessing pre-existing NBT data, you have to specify it exactly as it's stored. This includes the name, value, and the datatype. The Slot tag is stored as a Byte, while you've declared it as an Integer. You can append the numerical value with a "b" to declare it as a Byte:

/testfor @a {Inventory:[{Slot:0b,id:"minecraft:wooden_button"}]}

To mention, while the command will output whether or any there is any player at all with a wooden button in that slot, it does not allow you to target that player afterwards.

You can instead assign a label based on the player's NBT data and then target them based on that label:

1.8:

Objective required.

/scoreboard objectives add HasItem dummy

Detection commands.

/scoreboard players set @a HasItem 0
/scoreboard players set @a HasItem 1 {Inventory:[{Slot:0b,id:"minecraft:wooden_button"}]}
/say @a[score_HasItem_min=1]

1.9:

No objective needed, only detection commands.

/scoreboard players tag @a[tag=HasItem] remove HasItem
/scoreboard players tag @a[tag=!HasItem] add HasItem {Inventory:[{Slot:0b,id:"minecraft:wooden_button"}]}
/say @a[tag=HasItem]

Minecraft – Test if a player has drank a water bottle

First run this command once:

/scoreboard objectives add HasDrunk stat.useItem.minecraft.potion

This makes a scoreboard value that will increase by one for anyone who drinks a potion (which, by the game code, includes water bottles).

Next, in a repeating command block set to always active (number one in the below picture), write whatever command you want to activate, using @a[score_HasDrunk_min=1] instead of the player's name. Run another command if you want from the number 2 command block. Add as many as necessary all facing the same direction. Finally, in the last command block, write:

/scoreboard players set @a[score_HasDrunk_min=1] HasDrunk 0

Disclaimer:

You cannot use this with conjunction with drinkable potions. As a workaround, you could only give people splash potions

Best Answer

Related Solutions

Minecraft – Test if player has specific item in specific hotbar slot [1.8]

Minecraft – Test if a player has drank a water bottle

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